Java 如何处理android中的后退按钮按下
我有一个扩展片段的类。它从服务器接收数据并加载到片段布局上。数据来自AsyncTask doInBackground。但我面临的一个问题是，若asynctask仍在后台执行，并且用户按下“后退”按钮，则我的应用程序将转到另一个活动。但是当asynctask完成时，它找不到所需的布局，因此导致应用程序崩溃。如何在后台按下DO后退按钮时取消这个异步任务，更重要的是，如何调用后缀在片段中。 这是我的密码： TabsPagerAdapter.javaJava 如何处理android中的后退按钮按下,java,android,android-fragments,Java,Android,Android Fragments,我有一个扩展片段的类。它从服务器接收数据并加载到片段布局上。数据来自AsyncTask doInBackground。但我面临的一个问题是，若asynctask仍在后台执行，并且用户按下“后退”按钮，则我的应用程序将转到另一个活动。但是当asynctask完成时，它找不到所需的布局，因此导致应用程序崩溃。如何在后台按下DO后退按钮时取消这个异步任务，更重要的是，如何调用后缀在片段中。 这是我的密码： TabsPagerAdapter.java public class TabsPagerAdap
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Top Rated fragment activity
return new TopStoriesFragment();
case 1:
// Games fragment activity
return new NationalFragment();
case 2:
// Movies fragment activity
return new InternationalFragment();
case 3:
// Movies fragment activity
return new SportsFragment();
case 4:
// Movies fragment activity
return new TechnologyFragment();
case 5:
// Movies fragment activity
return new BusinessFragment();
case 6:
// Movies fragment activity
return new EntertainmentFragment();
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return 7;
}
public void stop() {
// get item count - equal to number of tabs
return;
}
}
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Top Stories", "National", "International", "Sports", "Technology", "Business", "Entertainment"};
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
public class BusinessFragment extends Fragment {
public String thehindu = "xxxxx";
public String toi = "xxxxx";
public String hindustantimes = "xxxxx";
public String indianexpress = "xxxxxx";
public String reuters = "xxxxxxx";
public String dainikjagaran = "xxxxxx";
public String dainikbhaskar = "xxxxx";
public String amarujala = "xxxxxx";
public String currenturl;
AlertDialog levelDialog;
public LayoutInflater inflater;
ListView listView;
int mCurCheckPosition;
SharedPreferences sp;
String papername;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_data, container,
false);
sp = getActivity().getSharedPreferences("myfile",
getActivity().MODE_PRIVATE);
papername = sp.getString("Newspaper_name", null);
feedTitle = (TextView) rootView.findViewById(R.id.feedtitle);
feedDescribtion = (TextView) rootView
.findViewById(R.id.feeddescribtion);
getCurrentURL();
listView = (ListView) rootView.findViewById(android.R.id.list);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(getActivity(), ShowDetails.class);
Bundle bundle = new Bundle();
bundle.putString("keyTitle", myRssFeed.getItem(position)
.getTitle());
bundle.putString("keyDescription", myRssFeed.getItem(position)
.getDescription());
bundle.putString("keyLink", myRssFeed.getItem(position)
.getLink());
bundle.putString("keyPubdate", myRssFeed.getItem(position)
.getPubdate());
intent.putExtras(bundle);
startActivity(intent);
}
});
startReadRss();
return rootView;
}
public class RssLoadingTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
displayRss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
preReadRss();
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
// super.onProgressUpdate(values);
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
readRss();
return null;
}
}
private RSSFeed myRssFeed = null;
TextView feedTitle;
TextView feedDescribtion;
// TextView feedPubdate;
// TextView feedLink;
public class MyCustomAdapter extends ArrayAdapter<RSSItem> {
public MyCustomAdapter(Context context, int textViewResourceId,
List<RSSItem> list) {
super(context, textViewResourceId, list);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
// return super.getView(position, convertView, parent);
View row = convertView;
if (row == null) {
inflater = LayoutInflater.from(getActivity());
row = inflater.inflate(R.layout.row, parent, false);
}
TextView listTitle = (TextView) row.findViewById(R.id.listtitle);
listTitle.setText(myRssFeed.getList().get(position).getTitle());
TextView listPubdate = (TextView) row
.findViewById(R.id.listpubdate);
listPubdate.setText(myRssFeed.getList().get(position).getPubdate());
return row;
}
}
private void startReadRss() {
new RssLoadingTask().execute();
}
private void getCurrentURL() {
if (papername.equalsIgnoreCase("The Times of India")) {
currenturl = toi;
} else if (papername.equalsIgnoreCase("The Hindu")) {
currenturl = thehindu;
} else if (papername.equalsIgnoreCase("The Hindustan Times")) {
currenturl = hindustantimes;
} else if (papername.equalsIgnoreCase("The Indian Express")) {
currenturl = indianexpress;
} else if (papername.equalsIgnoreCase("Reuters")) {
currenturl = reuters;
} else if (papername.equalsIgnoreCase("दैनिक जागरण")) {
currenturl = dainikjagaran;
} else if (papername.equalsIgnoreCase("दैनिक भास्कर")) {
currenturl = dainikbhaskar;
} else if (papername.equalsIgnoreCase("अमर उजाला")) {
currenturl = amarujala;
}
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
//
}
private void preReadRss() {
feedTitle.setText("--- wait ---");
feedDescribtion.setText("");
// feedPubdate.setText("");
// feedLink.setText("");
listView.setAdapter(null);
// Toast.makeText(getActivity(), "Reading RSS, Please wait.",
// Toast.LENGTH_LONG)
// .show();
}
private void readRss() {
try {
URL rssUrl = new URL(currenturl);
SAXParserFactory mySAXParserFactory = SAXParserFactory
.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void displayRss() {
if (myRssFeed != null) {
Calendar c = Calendar.getInstance();
// String strCurrentTiime = "\n(Time of Reading - "
// + c.get(Calendar.HOUR_OF_DAY)
// + " Hrs. : "
// + c.get(Calendar.MINUTE) + " Mins.)\n" +c.get(Calendar.AM_PM);
SimpleDateFormat sdf = new SimpleDateFormat(
"MMMM-dd-yyyy HH:mm:ss a");
String strCurrentTiime = sdf.format(c.getTime());
feedTitle.setText(papername);
feedDescribtion.setText(strCurrentTiime);
// feedPubdate.setText(myRssFeed.getPubdate());
// feedLink.setText(myRssFeed.getLink());
MyCustomAdapter adapter = new MyCustomAdapter(getActivity(),
R.layout.row, myRssFeed.getList());
listView.setAdapter(adapter);
}
}
}
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Top Rated fragment activity
return new TopStoriesFragment();
case 1:
// Games fragment activity
return new NationalFragment();
case 2:
// Movies fragment activity
return new InternationalFragment();
case 3:
// Movies fragment activity
return new SportsFragment();
case 4:
// Movies fragment activity
return new TechnologyFragment();
case 5:
// Movies fragment activity
return new BusinessFragment();
case 6:
// Movies fragment activity
return new EntertainmentFragment();
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return 7;
}
public void stop() {
// get item count - equal to number of tabs
return;
}
}
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Top Stories", "National", "International", "Sports", "Technology", "Business", "Entertainment"};
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
public class BusinessFragment extends Fragment {
public String thehindu = "xxxxx";
public String toi = "xxxxx";
public String hindustantimes = "xxxxx";
public String indianexpress = "xxxxxx";
public String reuters = "xxxxxxx";
public String dainikjagaran = "xxxxxx";
public String dainikbhaskar = "xxxxx";
public String amarujala = "xxxxxx";
public String currenturl;
AlertDialog levelDialog;
public LayoutInflater inflater;
ListView listView;
int mCurCheckPosition;
SharedPreferences sp;
String papername;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_data, container,
false);
sp = getActivity().getSharedPreferences("myfile",
getActivity().MODE_PRIVATE);
papername = sp.getString("Newspaper_name", null);
feedTitle = (TextView) rootView.findViewById(R.id.feedtitle);
feedDescribtion = (TextView) rootView
.findViewById(R.id.feeddescribtion);
getCurrentURL();
listView = (ListView) rootView.findViewById(android.R.id.list);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(getActivity(), ShowDetails.class);
Bundle bundle = new Bundle();
bundle.putString("keyTitle", myRssFeed.getItem(position)
.getTitle());
bundle.putString("keyDescription", myRssFeed.getItem(position)
.getDescription());
bundle.putString("keyLink", myRssFeed.getItem(position)
.getLink());
bundle.putString("keyPubdate", myRssFeed.getItem(position)
.getPubdate());
intent.putExtras(bundle);
startActivity(intent);
}
});
startReadRss();
return rootView;
}
public class RssLoadingTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
displayRss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
preReadRss();
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
// super.onProgressUpdate(values);
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
readRss();
return null;
}
}
private RSSFeed myRssFeed = null;
TextView feedTitle;
TextView feedDescribtion;
// TextView feedPubdate;
// TextView feedLink;
public class MyCustomAdapter extends ArrayAdapter<RSSItem> {
public MyCustomAdapter(Context context, int textViewResourceId,
List<RSSItem> list) {
super(context, textViewResourceId, list);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
// return super.getView(position, convertView, parent);
View row = convertView;
if (row == null) {
inflater = LayoutInflater.from(getActivity());
row = inflater.inflate(R.layout.row, parent, false);
}
TextView listTitle = (TextView) row.findViewById(R.id.listtitle);
listTitle.setText(myRssFeed.getList().get(position).getTitle());
TextView listPubdate = (TextView) row
.findViewById(R.id.listpubdate);
listPubdate.setText(myRssFeed.getList().get(position).getPubdate());
return row;
}
}
private void startReadRss() {
new RssLoadingTask().execute();
}
private void getCurrentURL() {
if (papername.equalsIgnoreCase("The Times of India")) {
currenturl = toi;
} else if (papername.equalsIgnoreCase("The Hindu")) {
currenturl = thehindu;
} else if (papername.equalsIgnoreCase("The Hindustan Times")) {
currenturl = hindustantimes;
} else if (papername.equalsIgnoreCase("The Indian Express")) {
currenturl = indianexpress;
} else if (papername.equalsIgnoreCase("Reuters")) {
currenturl = reuters;
} else if (papername.equalsIgnoreCase("दैनिक जागरण")) {
currenturl = dainikjagaran;
} else if (papername.equalsIgnoreCase("दैनिक भास्कर")) {
currenturl = dainikbhaskar;
} else if (papername.equalsIgnoreCase("अमर उजाला")) {
currenturl = amarujala;
}
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
//
}
private void preReadRss() {
feedTitle.setText("--- wait ---");
feedDescribtion.setText("");
// feedPubdate.setText("");
// feedLink.setText("");
listView.setAdapter(null);
// Toast.makeText(getActivity(), "Reading RSS, Please wait.",
// Toast.LENGTH_LONG)
// .show();
}
private void readRss() {
try {
URL rssUrl = new URL(currenturl);
SAXParserFactory mySAXParserFactory = SAXParserFactory
.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void displayRss() {
if (myRssFeed != null) {
Calendar c = Calendar.getInstance();
// String strCurrentTiime = "\n(Time of Reading - "
// + c.get(Calendar.HOUR_OF_DAY)
// + " Hrs. : "
// + c.get(Calendar.MINUTE) + " Mins.)\n" +c.get(Calendar.AM_PM);
SimpleDateFormat sdf = new SimpleDateFormat(
"MMMM-dd-yyyy HH:mm:ss a");
String strCurrentTiime = sdf.format(c.getTime());
feedTitle.setText(papername);
feedDescribtion.setText(strCurrentTiime);
// feedPubdate.setText(myRssFeed.getPubdate());
// feedLink.setText(myRssFeed.getLink());
MyCustomAdapter adapter = new MyCustomAdapter(getActivity(),
R.layout.row, myRssFeed.getList());
listView.setAdapter(adapter);
}
}
}
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Top Rated fragment activity
return new TopStoriesFragment();
case 1:
// Games fragment activity
return new NationalFragment();
case 2:
// Movies fragment activity
return new InternationalFragment();
case 3:
// Movies fragment activity
return new SportsFragment();
case 4:
// Movies fragment activity
return new TechnologyFragment();
case 5:
// Movies fragment activity
return new BusinessFragment();
case 6:
// Movies fragment activity
return new EntertainmentFragment();
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return 7;
}
public void stop() {
// get item count - equal to number of tabs
return;
}
}
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Top Stories", "National", "International", "Sports", "Technology", "Business", "Entertainment"};
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
public class BusinessFragment extends Fragment {
public String thehindu = "xxxxx";
public String toi = "xxxxx";
public String hindustantimes = "xxxxx";
public String indianexpress = "xxxxxx";
public String reuters = "xxxxxxx";
public String dainikjagaran = "xxxxxx";
public String dainikbhaskar = "xxxxx";
public String amarujala = "xxxxxx";
public String currenturl;
AlertDialog levelDialog;
public LayoutInflater inflater;
ListView listView;
int mCurCheckPosition;
SharedPreferences sp;
String papername;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_data, container,
false);
sp = getActivity().getSharedPreferences("myfile",
getActivity().MODE_PRIVATE);
papername = sp.getString("Newspaper_name", null);
feedTitle = (TextView) rootView.findViewById(R.id.feedtitle);
feedDescribtion = (TextView) rootView
.findViewById(R.id.feeddescribtion);
getCurrentURL();
listView = (ListView) rootView.findViewById(android.R.id.list);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(getActivity(), ShowDetails.class);
Bundle bundle = new Bundle();
bundle.putString("keyTitle", myRssFeed.getItem(position)
.getTitle());
bundle.putString("keyDescription", myRssFeed.getItem(position)
.getDescription());
bundle.putString("keyLink", myRssFeed.getItem(position)
.getLink());
bundle.putString("keyPubdate", myRssFeed.getItem(position)
.getPubdate());
intent.putExtras(bundle);
startActivity(intent);
}
});
startReadRss();
return rootView;
}
public class RssLoadingTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
displayRss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
preReadRss();
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
// super.onProgressUpdate(values);
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
readRss();
return null;
}
}
private RSSFeed myRssFeed = null;
TextView feedTitle;
TextView feedDescribtion;
// TextView feedPubdate;
// TextView feedLink;
public class MyCustomAdapter extends ArrayAdapter<RSSItem> {
public MyCustomAdapter(Context context, int textViewResourceId,
List<RSSItem> list) {
super(context, textViewResourceId, list);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
// return super.getView(position, convertView, parent);
View row = convertView;
if (row == null) {
inflater = LayoutInflater.from(getActivity());
row = inflater.inflate(R.layout.row, parent, false);
}
TextView listTitle = (TextView) row.findViewById(R.id.listtitle);
listTitle.setText(myRssFeed.getList().get(position).getTitle());
TextView listPubdate = (TextView) row
.findViewById(R.id.listpubdate);
listPubdate.setText(myRssFeed.getList().get(position).getPubdate());
return row;
}
}
private void startReadRss() {
new RssLoadingTask().execute();
}
private void getCurrentURL() {
if (papername.equalsIgnoreCase("The Times of India")) {
currenturl = toi;
} else if (papername.equalsIgnoreCase("The Hindu")) {
currenturl = thehindu;
} else if (papername.equalsIgnoreCase("The Hindustan Times")) {
currenturl = hindustantimes;
} else if (papername.equalsIgnoreCase("The Indian Express")) {
currenturl = indianexpress;
} else if (papername.equalsIgnoreCase("Reuters")) {
currenturl = reuters;
} else if (papername.equalsIgnoreCase("दैनिक जागरण")) {
currenturl = dainikjagaran;
} else if (papername.equalsIgnoreCase("दैनिक भास्कर")) {
currenturl = dainikbhaskar;
} else if (papername.equalsIgnoreCase("अमर उजाला")) {
currenturl = amarujala;
}
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
// else if(papername.equalsIgnoreCase("Times of India"))
// {
//
// }
//
}
private void preReadRss() {
feedTitle.setText("--- wait ---");
feedDescribtion.setText("");
// feedPubdate.setText("");
// feedLink.setText("");
listView.setAdapter(null);
// Toast.makeText(getActivity(), "Reading RSS, Please wait.",
// Toast.LENGTH_LONG)
// .show();
}
private void readRss() {
try {
URL rssUrl = new URL(currenturl);
SAXParserFactory mySAXParserFactory = SAXParserFactory
.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void displayRss() {
if (myRssFeed != null) {
Calendar c = Calendar.getInstance();
// String strCurrentTiime = "\n(Time of Reading - "
// + c.get(Calendar.HOUR_OF_DAY)
// + " Hrs. : "
// + c.get(Calendar.MINUTE) + " Mins.)\n" +c.get(Calendar.AM_PM);
SimpleDateFormat sdf = new SimpleDateFormat(
"MMMM-dd-yyyy HH:mm:ss a");
String strCurrentTiime = sdf.format(c.getTime());
feedTitle.setText(papername);
feedDescribtion.setText(strCurrentTiime);
// feedPubdate.setText(myRssFeed.getPubdate());
// feedLink.setText(myRssFeed.getLink());
MyCustomAdapter adapter = new MyCustomAdapter(getActivity(),
R.layout.row, myRssFeed.getList());
listView.setAdapter(adapter);
}
}
}
公共类BusinessFragment扩展了片段{
公共字符串thehindu=“xxxxx”；
公共字符串toi=“xxxxx”；
公共字符串statimes=“xxxxx”；
公共字符串indianexpress=“xxxxxx”；
公共字符串reuters=“xxxxxxx”；
公共字符串dainikjagaran=“xxxxxx”；
公共字符串dainikbhaskar=“xxxxx”；
公共字符串amarujala=“xxxxxx”；
公共字符串currenturl；
AlertDialog-levelDialog；
公共场所；充气机；
列表视图列表视图；
int mCurCheckPosition；
共享参考sp；
字符串papername；
@凌驾
创建视图上的公共视图（布局、充气机、视图组容器、，
Bundle savedInstanceState）{
视图根视图=充气机。充气（R.layout.fragment_数据，容器，
假）；
sp=getActivity（）.getSharedReferences（“myfile”，
getActivity（）.MODE_PRIVATE）；
papername=sp.getString（“报纸名称”，null）；
feedTitle=（TextView）rootView.findViewById（R.id.feedTitle）；
FeedDescription=（文本视图）根视图
.findViewById（R.id.FeedDescription）；
getCurrentURL（）；
listView=（listView）rootView.findviewbyd（android.R.id.list）；
setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父视图、视图v、，
内部位置，长id）{
Intent Intent=新的Intent（getActivity（），ShowDetails.class）；
Bundle=新Bundle（）；
bundle.putString（“keyTitle”，myRssFeed.getItem（位置）
.getTitle（））；
bundle.putString（“keyDescription”，myRssFeed.getItem（位置）
.getDescription（））；
bundle.putString（“键链接”，myRssFeed.getItem（位置）
.getLink（））；
bundle.putString（“keyPubdate”，myRssFeed.getItem（位置）
.getPubdate（））；
意向。额外支出（捆绑）；
星触觉（意向）；
}
});
startReadRss（）；
返回rootView；
}
公共类RssLoadingTask扩展异步任务{
@凌驾
受保护的void onPostExecute（void结果）{
//TODO自动生成的方法存根
displayRss（）；
}
@凌驾
受保护的void onPreExecute（）{
//TODO自动生成的方法存根
preReadRss（）；
}
@凌驾
受保护的void onProgressUpdate（void…值）{
//TODO自动生成的方法存根
//super.onProgressUpdate（值）；
}
@凌驾
受保护的Void doInBackground（Void…arg0）{
//TODO自动生成的方法存根
readRss（）；
返回null；
}
}
私有RSSFeed myRssFeed=null；
文本视图feedTitle；
文本视图反馈描述；
//TextView feedPubdate；
//文本视图feedLink；
公共类MyCustomAdapter扩展了ArrayAdapter{
公共MyCustomAdapter（上下文，int textViewResourceId，
（列表）{
super（上下文、textViewResourceId、列表）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
//TODO自动生成的方法存根
//返回super.getView（position、convertView、parent）；
视图行=转换视图；
if（行==null）{
充气器=从（getActivity（））开始充气；
行=充气机。充气（R.layout.row，父级，false）；
}
TextView listTitle=（TextView）row.findViewById（R.id.listTitle）；
listTitle.setText（myRssFeed.getList（）.get（position.getTitle（））；
TextView listPubdate=（TextView）行
.findViewById（R.id.listpubdate）；
listPubdate.setText（myRssFeed.getList（）.get（position.getPubdate（））；
返回行；
}
}
私有void startReadRss（）{
新的RssLoadingTask（）.execute（）；
}
私有void getCurrentURL（）{
if（papername.equalsIgnoreCase（“印度时报”））{
currenturl=toi；
}else if（papername.equalsIgnoreCase（“印度教”））{
currenturl=印度教；
}else if（papername.equalsIgnoreCase（“印度斯坦时报”））{
currenturl=1次；
}else if（papername.equalsIgnoreCase（“印度快车”））{
currenturl=indianexpress；
}else if（papername.equalsIgnoreCase（“路透社”））{
currenturl=路透社；
}else if（papername.equalsIgnoreCase（“दैनिक जागरण")) {
currenturl=dainikjagaran；
}else if（papername.equalsIgnoreCase（“दैनिक भास्कर")) {
currenturl=dainikbhaskar；
}else if（papername.equalsIgnoreCase（“अमर उजाला")) {
currenturl=amarujala；
}
//else if（papername.equalsIgnoreCase（“印度时报”））
// {
//
// }
//else if（papername.equalsIgnoreCase（“印度时报”））